Composition for purifying liquids.



ARTHI J'R H. KBIEGER, OF LOS ANGELES, CALIFORNIA, ASSIGNOR'TO KIESELGUHR COMPANY OF AMERICA, DE LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA. I v COMPOSITION FOR PURIFYING LIQUIDS.

' 1 1,212,648, Specification of Letters Patent.

No Drawing. I i

. Los Angeles, in the To all whom it may concern:

7 .and useful Composition for Purifying rial.

My composition may consistof equal parts Liquids, of which the following is a specification.

This invention relates to composition for use in processes of purifying sugar solutions or other liquids, and isespecially adapted to be used in carrying out the process described in application of F. R. Bachler, No. 11,150 filed March 1, 1915, for process of purifying liquids. The compositionmay, however, be used in connection with other processes or for other uses than that described insaid application. v

The composition constituting my invention consists of a mixture of finely divided kieselguhr or other porous absorbent car rier material and finely divided mineral colloid, preferably clay, or hydrous aluminum silicate, or other hydrous silicate or equivalent compound.

The'mineral colloid whichI prefer to use consists of a colloidal clay or hydrous aluminum silicate, sufiiciently colloidal to enable it to remain suspended in water for the time required for the carrying out of my process as hereinafter described, when added to the water in the proportion of, say, one tenth part of clay to one hundred parts of water. Any other suitable mineral-colloid may, however, be used. I also prefer to use kieselguhr'as the porous inert carrier mateby weight of kieselguhr and of colloidal clay or hydrous aluminum silicate. The proportions may, however, be varied, by adding more clay or more kieselguhr to the composition, depending on the amount of impurity to be removed from the solution, or on other conditions.

The ingredients of said composition may Ser. I

. tively than if it comprising a mixture of hydrous be finely divided by grindin before they are mixed, or the raw or unground materials may be ground together, in any suitable grinding mill. I

The composition may be used in purifying sugar or other solutions'by adding, say, one-fifth part of the composition to one hundred parts 'of thesolution, and then heating and adding a suitable flocculator or coagulating agent, such as an emulsion orv jelly of flaxseed or cottonseed meal, as de- Patented Jan. 16, 1917.

Application filed September 27, 1915. Serial No. 52,822.

scribed in the application aforesaid." Orthe composit on may be used without the addition of any is suflicient ent in the solution to act as a coagulating or flocculating means. In. order to facilitate flocculating agent, in case there flocculating agent already presthe introduction of the composition into a the solution, it may be saturated with water to form-a paste or cream whichis then added to the solution and 'stirred thereinta The kieselguhr or porous'carrier. material .has I the eifect of maintaining the openness-10f structure of the precipitate formed ginjthe flocculationor coagulation,

so .as to lenable the subsequent filtration to be. arri dut more effectively and. readily.

By using this composition con'sistinglof a.

mixture of a; porous carrier (finely divided kieselguhr) and mineral colloid 1t.is poss1- ble to introduce the colloidal 1 material and the porous carrier simultaneously at any.

part ofthe solution, so thatthe flocculent precipitate is formed in open porousfcondition much'more efi'eoin the presence of the inert porous carrier and is therefore retained were attempted to mix the porous carrier material with the precipitate during or after flocculation. The use of this mixture also saves time in the operation.

WhatIclaimis': 1. A composition for purifying liquids comprising a mixture of mineral colloid and a porous carrier material.

; 2. A composition for purlfymg liqu ds a ummum silicate and kieselguhr, both in finely divided condition. 7

3. A composition for purifying liquids comprising a mixture of finely divided kies elguhr and a mineral colloid,

4:. A. composition for purifying liquids comprising a mixture of finely divided kieselguhr and finely divided colloidal clay,

, in substantially equal proportions.

5. A composition of matter consisting of finely divided kieselguhr intimately mixed With finely divided colloidal clay.

6. A composition for purifying liquids comprising a mixture of finely divided kieselguhr and a colloidal material.

In testimony whereof I have hereunto set my hand, at Los Angeles, California, this 14th dayiof September, 1915.

ARTHUR H. KRIEGER. 

